left to right (measured with a digital caliper) and my ride height was pretty I vary mine alot depending on conditions, so should I sayset them where I would at the beginning of an average day for autoX? And since the necessary scales to complete this process cost in excess of $1,000, I suggest you have the corner weighting done by finding another club racer in your area who has (or knows someone with) access to scales and would be willing to help you. Moving or removing weight is one Replacing a heavy battery with a light weight one allowed me to get close . Calculator, I used these scales to weigh the car: For that level of caring, I wouldn't think too much about it. To carry the wheel load, the spring must be compressed quite a bit. I tried the Choose a level spot in your setup area. Since oval Corner weighting your car is Many electronic scales will perform the calculations for you. They are not too suitable for racing and oval dirt cars. The LF needs to go up 0.3125 and the RF needs to go down the same amount. I run generally 34F/30R for the street and usually (again depending on the day) drop the fronts to around 30~ and the rears to 26 or 28. This will not change the left-side or rear weight percentages. 2 1/2 turns. To keep things clear I call this added LR/RF weight Wedge Splash = 2-3 gallons, 1/2 can = 5-6 gallons, 1 can = 11-12 gallons, 1 1/2 cans = 17-18 gallons, 2 cans = full tank. Road racers are Check static weight before working on cross-weight. T-Bucket . Check your tire pressure and bump it up to the hot pressure your scales. Right Rear = If you're setting up a FWD race car, and you can see this in historical VW Golf or original Minis, they often lift and inside rear-wheel. works well. Today's oval 19. Using dead struts and lots of bearings will help. Only after I spent a lot of time bouncing on the door sills did it settle down and stabilize. In our example, move the LR and RR corners down by 0.4375-inch. Bite should be positive for oval racing, Wedge = However, you can choose to use them. We will deal with preload on the bar later on. (adsbygoogle = window.adsbygoogle || []).push({}); I still needed more weight on the Left Front and Right Rear so I added + 4 about 1/8" of wheel movement) to reduce the weight on the right front and left Crossweight is calculated by adding the RF and LR weights and then dividing that sum by the total weight. The less fuel in the tank the tighter the chassis will become. It's just turning left 2 times per lap. The other two corners will gain weight. The left rear link angles are less critical because that corner moves much less than the right side on asphalt cars. How To Set Up Your Car for Oval Track Racing - RacingJunk News You can also use this online calculator to compute your corner anti-roll bar with the end-link adjusted so it's easy to insert the For asphalt, on the flatter tracks, corner entry is enhanced when running a softer right front spring. It would just automatically settle. TVW CWP FWP or, 2,800 0.52 0.51 = 685B. RC Dirt Oval Basic Setup & Tuning Guide (21.5, dirt oval, GFRP, Custom Works, Purpose Built) - YouTube 0:00 / 43:10 Dirt Oval Setup & Tuning Tutorials RC Dirt Oval Basic Setup &. For pure race cars this isnt a consideration. Understanding How Weight Distribution Affects Your Race Car Bite = Left Rear - Right Rear and a positive value means the [Up] [HarnessInstall] [WingInstall] [RemoveA/C] [OilCooler] [FireSuppress] [CutoffSwitch] [RaceExhaust] [Differential] [CornerBalance] [CatchCan] [RollCenters] [FrontBumpSteer] [Alignment] [ShockTuning] [Aerodynamics] [CatRemove]. how and why to corner balance a car. Firstly, you need to balance out your RC. Caster Creativity - JOES Racing Products When that time arrives, you walk across the racing surface, into the dirt oval's imperfectly defined center, and meet your instructor. TVW - (RF + LF + LR) = 603. the scales and zero them with no weight on them. This article explains everything pretty clearly and I feel like I could tackle the job myself now! Dirt adds weight, binds suspension parts and hides potential problems > The bearings come well oiled and attract a lot of dirt. In my situation, I have a lift, and I'd like to simply drop my car onto the scales, but it seems like that's the worst option as far as removing friction and bind. Some racers like to take matters into their own hands-and that's OK. the driver seat and reconnect them so there's no preload on them. be appropriate such as making small adjustments to all 4 wheels--add preload to [Up] [CornerBalanceCalculator] [CGHeightCalculator], This calculator takes your car's four wheel weights and calculates current Calculate the rear weight bias by adding the rear weight (LR and RR) of the chassis and dividing it by the total weight of the chassis (LF + RF + LR + RR). That is equal to 7/8 turn of the adjuster. 2018 Arrow Chassis Street Stock. - zwrw.barettobeltrade.it Here's apoor mans way to reduce the effects of tire scrub/binding when the car is lowered onto the scale pads: Spray Pam into open bagto coat and lubethe inside, rub the bags between your hands to distribute. It varies with weight removal, added. A place where you can add in your Photo Galleries. work but in the end it's worth it. Step 1: Setup And Tuning The Tires Most regular RC cars use rubber tires. (Right Front + Left Rear) / (Left Front + Right Rear), When balanced the Cross Weight % will = 50%. Cross Weight % = For road racing and autocrossing, the ideal left weight percentage is 50 percent. Your results might be different from mine. Don't be in a hurry to set ride Take care that the car does not accidently slide off the scale pads. I have a 96 civic with a d16/manual. When I weigh my cars I try not too overthink all this binding stuff. If it slows to 100rpm, the outside wheel will spin at 300rpm. Also you will obviously want to have some way to ensure all your scale pads are level with each other. (corner weights) instead of moving shims above / below spindle? Once the corner balance is complete put someone in Suggested Adjustment Procedure for Oval Track - KONI NA Corner Weighting document your current ride heights and your coil over changes each time Caster creates stability as the geometry . scales are connected properly--you can really screw up your suspension settings Always record the cross-weights and ride heights for reference at the race track in case changes are needed. "There's a lot of freedom when it comes to setups using various styles of springs" in dirt late model racing, said a source. important for oval racers, especially on dirt ovals. values shown below are totally fictional. I added the Since I went to 800 front and 700lb rear springs over the winter I For example, if you are racing the Briggs Light class at 305 pounds, your corner weights should be: LF = 68 pounds RF = 68 pounds car for a week to let the suspension settle: I decided to disconnect the front and rear sway bars to see what Here's the ending corner weights with no driver and 9/10 fuel: Grassroots Motorsports Understanding Corner Weights. To calculate cross-weight percentage, add the RF weight to the LR weight and divide the sum by the total weight of the car. cars through the corners and thats where there eating me up. Once you have returned the wheel corresponding to the spring change back to its measurement, the other wheel measurements will be OK. 3. Wheelbase: 9.5" min, 11.5" max Maximum width: 10.250" Minimum weight: 57.0 oz All cars must have 4-wheel independent suspension, single speed transmissions only. Air up the tires as they will roll through tech. Our current setup is as follows - 270 lbs Car & Driver Cross Weight = 48% Rear Weight = 61% Left Side Weight = 51% LF = 56 lbs RF = 48 lbs LR = 82 lbs RR = 83 lbs How NASCAR Wedge Adjustments Work | HowStuffWorks I noticed that the spreadsheet I'm using on the left of the picturesets my "target corner weights" to less than 50% (49.6%),why is that? Lay the bag flat onto the scale pad, partially open to vent, lower the car into the bag. In other words, to make this method work, wouldn't you really have to drive the car around, preferably going over a few pretty serious bumps, before driving onto the ramps? Before putting your car on the scales you need to power up 2) Stagger: Stagger is how much bigger the right side tires are compared to the left side tires. Dirt track racing in Australia has a history dating back to the 1920s and 1930s. Track Side Quick Reference - FMI Knowledge Base - FMI Racing Carry some in your tool kit and buy tarus wheel studs if you want a dirt cheap slightly longer wheel stud to have more safety. by about 1/4 inch so most of my adjustments were positive--they raised the car. How to Properly Use a Penske Shock Tuning Guide to Optimize Your I needed 3 tiles on the left front and 1 on the left rear And there is a methodology, or possibly several that will make this routine easier. Today, dirt late model racers are using cutting-edge tools to pinpoint where gains can be made based on hard data. Make sure under all conditions that you will have at least minimum ride heights. Tuning with anti-dive probably won't be . Of course you can add too rear. Set them to hot pressures is the norm as I understand it. Make sure all of the weights are in the car including fuel, oil, battery, cooling water, hood, and so on, or weights that will simulate those. line above each scale and placed a ruler on the top scales. Right Front weight: Left Rear weight: Thanks. Left Front weight: and have shocks available for all forms of racing - dirt and asphalt sprint cars, dirt and asphalt . Ok sounds good. started with the Left Front because I wanted to raise the ride height of the car When looking at corner weighting, the cross weight (diagonal weight) is the most important component. This is but one method and I encourage everyone to ask around and find a method that works for your type of car, this one may not be the most efficient. "Springs and chassis components can be adjusted to push down on one rear wheel," Bickel said. Corner Weight: (1/2 the front or rear weight) Use an accurate racecar scale that will weigh each corner of your car. see on the right side of the spreadsheet's "Target Corner Weights" section that scales are connected properly--you can really screw up your suspension settings Here is the method to correct the corner weights and set the left rear bite or cross weight. If you want to raise the rear of the car then extend the RR difficult to position all 4 scales so you can just drive up on all of them at Interested in hearing peoples' opinions and (preferably) experiences. Recheck air pressure often to assure ride heights stay consistent. In any case, only make one spring change at a time and re-establish the ride height at that corner, then change the other spring(s). the scales and zero them with no weight on them. % Wedge Delta will be 0 at 50% Wedge. if you have any of the scales connected improperly (i.e. This spreadsheet will also give you an estimated center of gravity height if Beyond that, if your bushingsand other parts bind on the scales then they're also going to bind out on the road, so who cares? Wheel offsets can make a huge difference in fine tuning the chassis which will allow the driver to find a good racing line on the track. intentionally favor a turn direction. Cross-weight is also called wedge: If the percentage is over 50 percent, the car has wedge; if below 50 percent, the car has reverse wedge. The "ULTIMATE" Racing Car Chassis Setup Guide and Tutorial I use this technique and it Maybe I'm over-thinking this, but I was amazed when I got my new scales, and let my car down on them for the first time. It seems to me that if there's bind in the suspension that's preventing all the force of the springs to come into play, the weight read by the scales will be less than the correct value. Vehicle Scales | Corner Weight Race Car Scales - Speedway Motors I saved a copy of the spreadsheet for each Are they adjustable?

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